AT6856

Overview

The AT6856 is a high-quality, low-power analog-output bottom-ported omni-directional MEMS microphone. It integrates a MEMS microphone element and a preamplifier to deliver natural sound with high SNR and flat wideband frequency response. The device operates within a supply voltage range of 1.5 V to 3.6 V. It features an acoustic sensitivity of -38dB ±1dB @ 94dB SPL and a signal-to-noise ratio of 65dB(A). The frequency range spans from 20 Hz to 20 kHz, with an impedance of 100 Ohms.

Feature Summary

• Integrates a MEMS microphone element and a preamplifier for analog output
• Bottom-ported design for omnidirectional sound capture
• High signal-to-noise ratio with flat wideband frequency response

Applications

• Consumer electronics audio input
• Voice recognition systems
• Mobile communication devices

Procurement Notes

Verify the manufacturer designation as Analog Technologies, Inc., distinct from Analog Devices or Maxim Integrated products sharing similar numeric prefixes. Confirm the specific package type matches the target PCB footprint. Ensure the component meets the required environmental specifications for the intended deployment environment before finalizing procurement.

Selection Notes

Select this component when a low-power, analog-output MEMS solution is required. The bottom-port configuration suits applications where top-access is obstructed. The 100 Ohm impedance and -38dB sensitivity are suitable for standard audio interfaces. Verify compatibility with the system's power supply rails between 1.5 V and 3.6 V.

Part Context

This component belongs to the category of silicon MEMS microphones designed for portable and consumer electronic applications. It serves as an acoustic transducer converting sound pressure into electrical signals. The integration of the preamplifier allows for direct interfacing with audio processing units without external amplification stages.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-referencing requires matching the acoustic sensitivity, frequency response, and physical dimensions of alternative bottom-ported MEMS microphones.

FAQ

What is the acoustic sensitivity of the AT6856?

The sensitivity is specified as -38dB ±1dB at 94dB SPL.

Does the AT6856 have a digital or analog output?

It provides an analog output signal.

What is the operating voltage range?

The device operates within a supply voltage range of 1.5 V to 3.6 V.